Astronomy and Astrophysics – Astronomy
Scientific paper
May 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980natur.285...91s&link_type=abstract
Nature, vol. 285, May 8, 1980, p. 91-93.
Astronomy and Astrophysics
Astronomy
10
Galaxies, Infrared Astronomy, Quasars, Gravitational Effects, Radiant Flux Density, Wavelengths
Scientific paper
Infrared observations of the double quasar 0957 + 561 A, B and the intervening galaxy believed to be responsible for its double appearance by gravitational light deflection are reported. Observations were obtained of each quasar at 1.6 and 2.2 microns and of the 12.5 arcsec region centered between the two quasars at 1.2, 1.6 and 2.2 microns. Extended IR emission is observed in the vicinity of both quasars and is attributed to emission from the intervening galaxy. The two quasars are found to have a constant flux ratio in all observed wavelength ranges, consistent with the achromatic imaging predicted by the gravitational lens model, and to exhibit an unusual continuum distribution in the region 0.35-2.2 microns. The infrared observations are also consistent with a giant elliptical lens galaxy at a redshift of approximately 0.40.
Becklin Eric E.
Capps R.
Matthews Keith
Neugebauer Gernot
Soifer Thomas B.
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